/*
 *  Copyright 2004 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.core.contentField;

import com.blandware.atleap.common.Constants;
import com.blandware.atleap.model.core.ActionPage;
import com.blandware.atleap.model.core.ContentPage;
import com.blandware.atleap.model.core.Layout;
import com.blandware.atleap.model.core.Localizable;
import com.blandware.atleap.service.core.LookupManager;
import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.form.core.ContentFieldForm;
import com.blandware.atleap.webapp.util.core.WebappConstants;
import org.apache.commons.validator.GenericValidator;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * <p>Forward to the page with list of content fields
 * </p>
 * <p><a href="ListContentFieldsAction.java.html"><i>View Source</i></a></p>
 * <p/>
 *
 * @author Sergey Zubtsovskiy <a href="mailto:sergey.zubtsovskiy@blandware.com">&lt;sergey.zubtsovskiy@blandware.com&gt;</a>
 * @version $Revision: 1.19 $ $Date: 2008/04/29 17:48:05 $
 * @struts.action path="/core/contentField/list"
 * name="contentFieldForm"
 * validate="false"
 * roles="core-contentField-list"
 * @struts.action-forward name="viewLayout"
 * path="/core/layout/view.do"
 * redirect="true"
 * @struts.action-forward name="viewContentPage"
 * path="/core/contentPage/view.do"
 * redirect="true"
 * @struts.action-forward name="viewActionPage"
 * path="/core/actionPage/view.do"
 * redirect="true"
 */
public final class ListContentFieldsAction extends BaseAction {
	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request, HttpServletResponse response) throws Exception {


		Long ownerId = null;
		ContentFieldForm contentFieldForm = (ContentFieldForm) form;
		if ( !GenericValidator.isBlankOrNull(contentFieldForm.getOwnerId()) ) {
			ownerId = Long.valueOf(contentFieldForm.getOwnerId());
		} else if ( request.getAttribute(WebappConstants.OWNER_ID_KEY) != null ) {
			ownerId = (Long) request.getAttribute(WebappConstants.OWNER_ID_KEY);
		} else if ( request.getSession().getAttribute(WebappConstants.OWNER_ID_KEY) != null ) {
			ownerId = (Long) request.getSession().getAttribute(WebappConstants.OWNER_ID_KEY);
		} else {
			if ( log.isWarnEnabled() ) {
				log.warn("Missing owner ID. Returning to index...");
			}
			return mapping.findForward("admin");
		}

		LookupManager lookupManager = (LookupManager) getBean(Constants.LOOKUP_MANAGER_BEAN);
		Localizable owner = lookupManager.retrieveLocalizable(ownerId);

		if ( owner == null ) {
			// owner not found - it might has been deleted
			ActionMessages errors = new ActionMessages();
			errors.add("ownerNotFound", new ActionMessage("core.contentField.errors.ownerNotFound"));
			saveErrors(request, errors);
			return mapping.findForward("admin");
		}

		String key = new String();
		ActionForward forward = null;

		if ( owner instanceof Layout ) {
			forward = mapping.findForward("viewLayout");
			key = WebappConstants.LAYOUT_ID_KEY;
		} else if ( owner instanceof ContentPage ) {
			forward = mapping.findForward("viewContentPage");
			key = WebappConstants.CONTENT_PAGE_ID_KEY;
		} else if ( owner instanceof ActionPage ) {
			forward = mapping.findForward("viewActionPage");
			key = WebappConstants.ACTION_PAGE_ID_KEY;
		} else {
			// TODO: temporary plug. fix it
			forward = mapping.findForward("admin");
		}

		request.getSession().setAttribute(key, ownerId);

		// save transaction token in request
		saveToken(request);
		return forward;
	}
}